Step 1 - Take a few photos of the damaged derailleur hanger from both sides and the rear of your bike.

Take a photo of the damaged derailleur hanger from both sides and the rear of your bike. If you hanger broke in to two or more pieces, re-assemble it the best you can. If you need help re-assembling your hanger, click the Derailleur Hanger Anatomy tab above for some help.

Step 2 -Take a photo of the frame's rear dropout from both the outside and inside with the hanger removed.

Take a photo of the frame's rear dropout from both the outside and inside with the hanger removed.

Step 3 - Send us an email with your photos attached.

Key Features to Help Identify Your Replacement Hanger

The replacable derailleur hanger is secured to the bike's frame using a fastener or fastener. A hanger can use up to 4 fasteners, but most hangers use one or two.

Axle/Hub Socket

The socket where the rear hub sits when the rear wheel is properly inserted and secured in the frame.

Rear Derailleur Hole

10mm x 1 threaded hole where the rear derailleur is attached to the hanger

Rear Derailleur B-Screw Tab

This tab is an important feature on any hanger and allows for the rear derailleur pulley clearance to be set. The flat side of the tab always faces towards the rear of the bike.

Dropout / Hanger Notes

Inside Dropout

Outside Dropout

Pocket for Hanger

Hanger with Chainring BoltStyle Fastener

Note the orientation of the hanger on the frame. The hanger shown on the white frame attaches to the frame from the inside. The hanger on the black frame attaches to the frame from the outside.

Fasteners shown here on the white frame are M3 x 8, and are inserted through the frame and threaded in to the hanger. Make a note if your hanger is threaded for the fasteners, or if your frame is threaded.

The hanger on the black frame uses a chainring style nut and bolt. Hangers using a chainring bolt typically place the nut on the inside of the dropout and the bolt on the outside of the dropout (as shown).

The third photo to the left shows the pocket machined in the frame's dropout where the hanger sits.